JP2021174571A - Substrate mount type connector, and substrate with connector - Google Patents

Abstract

To provide a substrate mount type connector having high assembly accuracy with a substrate.SOLUTION: A substrate mount type connector 1 includes: terminals 20 to be soldered to through holes 41 of a substrate 40; a housing 10 which holds the terminals 20; and an attachment part 30 formed of a material higher in heat resistance than a material forming the housing 10. The attachment part 30 is to be engaged with the housing 10 and attached to the substrate 40 using a metal attachment component 50. The attachment part 30 has positioning holes 31 for positioning the terminals 20 to the through holes 41 of the substrate 40, and is engaged with the housing 10 in a state that the terminals 20 are inserted into the positioning holes 31. An engagement part of the housing 10 to be engaged with the attachment part 30 is in a different position from a contact part of the attachment part 30 to come into contact with the attachment component 50.SELECTED DRAWING: Figure 3

Description

The present invention relates to a board-mounted connector and a board with a connector.

Conventionally, various board-mounted connectors have been proposed. For example, one of the conventional board-mounted connectors is screwed to the circuit board with a metal bolt, and then the terminal inserted into the through hole of the circuit board and the circuit pattern are soldered. (See, for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2003-031323 JP-A-2007-018908

By the way, as a method of soldering the through hole of the circuit board and the terminal, the connector is fixed to the front surface of the circuit board while the terminal is inserted through the through hole, and then the molten solder liquid is applied to the circuit board. There is a method of solidifying the solder liquid after invading the solder liquid into the through hole by spraying it on the back surface of the (so-called flow type soldering). Here, if flow-type soldering is adopted when manufacturing the above-mentioned conventional connector, the molten solder liquid is also sprayed on the bolts exposed on the back surface of the circuit board, and the bolts are the same as the solder liquid. It will be heated to a high temperature of about. Therefore, depending on the temperature reached by the bolt, the connector may be softened or deformed at the contact point between the bolt and the connector (that is, the screwed portion). In particular, when lead-free solder having a melting point higher than that of general solder is used, it is considered that the possibility of thermal deformation of the connector described above increases because the bolt becomes even higher in temperature.

Such thermal deformation of the connector may hinder proper fixing of the connector to the circuit board and cause a decrease in the accuracy of assembling the connector. Therefore, it is desirable to suppress it as much as possible. As understood from the above description, not only when bolts are used, but also when mounting parts made of a metal material having high thermal conductivity are used, the above-mentioned thermal deformation can be suppressed. desirable.

In view of the above situation, it is desirable that the board-mounted connector and the board with the connector have a structure having high assembly accuracy with the board.

One of the objects of the present invention is to provide a board-mounted connector having high assembly accuracy with a board and a board with a connector.

In order to achieve the above-mentioned object, the board-mounted connector and the board with a connector according to the present invention are characterized by the following [1] to [4].
[1]
The terminals that will be inserted into the through holes provided on the board and soldered,
A housing that holds the terminals and
It is composed of a material having higher heat resistance than the material constituting the housing, and includes a mounting portion that engages with the housing and is mounted on the substrate by using a metal mounting component.
Must be a board-mounted connector.
[2]
In the connector described in [1] above,
The mounting part is
It has a positioning hole for positioning the terminal with respect to the through hole, and is engaged with the housing with the terminal inserted through the positioning hole.
Must be a board-mounted connector.
[3]
In the connector according to the above [1] or the above [2],
The engaging portion where the housing and the mounting portion are engaged and the contact portion where the mounting portion and the mounting component come into contact with each other are at different positions.
Must be a board-mounted connector.
[4]
A board with a connector including a connector and a board on which the connector is mounted.
The connector is
Terminals that will be connected to the through holes provided in the board using solder,
A housing that holds the terminals and
A mounting portion made of a material having higher heat resistance than the material constituting the housing, which engages with the housing and is mounted on the substrate by using a metal mounting component. , With
Must be a board with a connector.

According to the board-mounted connector having the configuration of [1] above, a separate mounting portion that engages with the housing is mounted on the board using a metal mounting component. Further, the mounting portion is made of a material having higher heat resistance than the material constituting the housing. Therefore, the connector having this configuration can suppress thermal deformation of the housing due to soldering as compared with the conventional connector. Therefore, the connector having this configuration is excellent in assembly accuracy with the substrate.

In the board-mounted connector having the configuration of the above [2], the mounting portion is a so-called alignment plate having a positioning hole having a function of positioning a terminal with respect to a through hole of the board. In other words, in the connector of this configuration, the mounting portion (that is, the alignment plate) is directly fixed to the substrate by using the mounting component. Therefore, compared to the structure in which a separate alignment plate is assembled to the housing fixed to the substrate (that is, the structure in which the alignment plate is fixed to the substrate via the housing), the gap between the housing and the alignment plate is eliminated. The positioning accuracy of the terminal with respect to the through hole is improved.

Furthermore, as another effect, even when multiple types of connectors are prepared according to the specifications of the board to be mounted, the connector can be prepared by preparing only multiple types of mounting parts while having a common structure for the housing. Manufacturing cost can be reduced.

In the board-mounted connector having the configuration of the above [3], the engagement portion between the housing and the mounting portion and the contact portion between the mounting portion and the mounting component are at different positions. Therefore, the former engaging portion is less likely to be affected by the heat transferred to the latter contact portion via the mounting component. Therefore, the connector having this configuration can further suppress the thermal deformation of the housing due to soldering.

According to the board with a connector having the configuration of [4] above, a separate mounting portion that engages with the housing is mounted on the board using a metal mounting component. Further, the mounting portion is made of a material having higher heat resistance than the material constituting the housing. Therefore, the substrate with a connector having this configuration can suppress thermal deformation of the housing due to soldering. Therefore, the board with a connector of this configuration is excellent in the assembling accuracy between the board and the connector.

As described above, according to the present invention, it is possible to provide a board-mounted connector having high assembly accuracy with a board and a board with a connector.

The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through the embodiments described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a connector and a substrate with a connector according to an embodiment of the present invention. FIG. 2 is a perspective view of the connector shown in FIG. 1 and the substrate with the connector as viewed from the rear. FIG. 3 is an exploded perspective view of the connector shown in FIG. 2 and the substrate with the connector. FIG. 4 is a perspective view showing a state in which the connector shown in FIG. 2 and the circuit board are separated from each other.

<Embodiment>
Hereinafter, the connector 1 and the substrate with a connector 2 according to the embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the connector 1 is a board-mounted connector, and when the connector 1 is mounted on the circuit board 40, the board 2 with a connector can be obtained.

As shown in FIG. 3, the connector 1 includes a housing 10, a plurality of terminals 20 held in the housing 10, and an alignment plate 30 that engages with the housing 10. In the substrate 2 with a connector, the mating side terminal (female terminal, not shown) housed in the mating side housing is fitted by fitting the mating side housing (not shown) of the mating side connector to the hood portion 12 (described later) of the housing 10. (Omitted) and the conductor pattern (not shown) of the circuit board 40 are electrically connected via the terminal 20.

Hereinafter, for convenience of explanation, as shown in FIG. 1 and the like, "front-back direction", "vertical direction", "width direction", "front", "rear", "top", and "bottom" are defined. The front-back direction, the up-down direction, and the width direction are orthogonal to each other. The front-rear direction coincides with the fitting direction between the housing 10 and the mating housing. Hereinafter, the housing 10, the terminal 20, the alignment plate 30, and the circuit board 40 constituting the substrate 2 with the connector will be described in order.

First, the housing 10 will be described. As shown in FIG. 3, the resin housing 10 integrally includes a terminal holding portion 11 and a hood portion 12 projecting forward from the terminal holding portion 11. The terminal holding portion 11 has a rectangular flat plate shape that extends in the width direction and the vertical direction and is long in the width direction. In this example, a relatively inexpensive PBT resin (polybutylene terephthalate resin) is used as the resin material constituting the housing 10.

The terminal holding portion 11 is formed so that a plurality of press-fitting holes 13 penetrating in the front-rear direction for press-fitting and accommodating the connection terminal portions 21 (described later) of the plurality of terminals 20 are arranged in a predetermined pattern. .. In this example, nine press-fitting holes 13 are formed so as to be arranged at equal intervals in the width direction.

The hood portion 12 projects forward from the front surface of the terminal holding portion 11 so that the inside of the hood portion 12 communicates with the plurality of press-fitting holes 13. The hood portion 12 has a rectangular hood-like shape with an opening at the front. Inside the hood portion 12, the tip portion of the connection terminal portion 21 press-fitted from the rear side so as to penetrate the press-fit hole 13 of the terminal holding portion 11 is located. The connection terminal portion 21 (male terminal) located inside the hood portion 12 is connected to the mating terminal (female terminal) housed in the mating housing fitted in the housing 10.

A locking projection 14 is formed at the center in the width direction of the front end portion on the upper surface of the upper wall portion constituting the hood portion 12. When the housing 10 and the mating housing are fitted together, the locking projection 14 engages with a lock portion (not shown) provided on the mating housing so that the housing 10 and the mating housing are brought into contact with each other in the front-rear direction. It serves to prevent separation.

Protrusions 15a are provided on each of the pair of corners 15 located at both ends of the lower end of the terminal holding portion 11 in the width direction. Each protrusion 15a engages with a groove 34a provided in each of the pair of corners 34 (described later) of the alignment plate 30 to fix the housing 10 and the alignment plate 30 to each other.

Next, the terminal 20 will be described. The terminal 20 is formed by processing a rod-shaped member having a rectangular cross section made of a metal material such as copper or a copper alloy, and as shown in FIG. 3, a linear connection terminal portion 21 extending in the front-rear direction and a connection terminal. It has an L-shaped shape including a linear mounting terminal portion 22 that bends from the rear end portion of the portion 21 and extends downward. The tip end portion (lower end portion) of the mounting terminal portion 22 is inserted into the through hole 41 (see FIGS. 3 and 4) of the circuit board 40.

Next, the alignment plate 30 will be described. The resin alignment plate 30 is a member that mainly functions to position a plurality of terminals 20 held in the housing 10 with respect to a plurality of through holes 41 (described later) of the circuit board 40. As the resin material constituting the alignment plate 30, in this example, SPS resin (syndiotactic polystyrene resin) having higher heat resistance than the PBT resin constituting the housing 10 is adopted. The effect of this will be described later.

As shown in FIG. 3, the alignment plate 30 generally has a rectangular flat plate shape that extends in the width direction and the front-rear direction and is long in the width direction. The alignment plate 30 is formed with a plurality (9) positioning holes 31 penetrating in the vertical direction for inserting and positioning the mounting terminal portions 22 of the plurality of terminals 20 so as to be arranged at equal intervals in the width direction. ing.

A pair of thickened portions 32 projecting upward are formed at both ends of the alignment plate 30 in the width direction. A pair of bolt holes 33 (see FIG. 3) penetrating in the vertical direction through which the shaft portion (male screw portion) of the pair of metal bolts 50 (see FIG. 3) is screwed into the rear end portion of the pair of thick portions 32. Female thread part) is formed. The alignment plate 30 is fixed to the circuit board 40 by using a pair of bolts 50.

In the front region of the pair of thick portions 32, a pair of corner portions 34 that are recessed outward in the width direction and open upward and forward are formed. The pair of corners 34 have a concave shape corresponding to the pair of corners 15 so that they can be fitted with the pair of corners 15 of the housing 10. The pair of corner portions 34 and the pair of corner portions 15 are configured so as to be able to be locked to each other by a locking mechanism utilizing the fitting of the protrusion 15a and the groove 34a. The pair of corners 34 (that is, the engagement points where the housing 10 and the alignment plate 30 are engaged) with respect to the pair of bolt holes 33 (that is, the contact points where the alignment plate 30 and the bolt 50 come into contact). , In different positions away from the front.

Next, the circuit board 40 will be described. The circuit board 40 is a resin circuit board provided with a plurality of electronic components (not shown), and in this example, it has a rectangular flat plate shape extending in the width direction and the front-rear direction and long in the width direction. ..

As shown in FIG. 3, the circuit board 40 has a plurality of (9) through holes 41 into which the tips of the mounting terminal portions 22 of the plurality of terminals 20 are inserted at the positions where the housing 10 is mounted. It is formed so as to be lined up at equal intervals in the direction. The mounting terminal portion 22 inserted into the through hole 41 is electrically connected to the conductor pattern by being soldered to a conductor pattern (not shown) formed on the back surface (lower surface) of the circuit board 40. become.

The circuit board 40 is formed with a pair of bolt insertion holes 42 penetrating in the vertical direction in which the shaft portions of the pair of bolts 50 are inserted, corresponding to the pair of bolt holes 33 of the alignment plate 30. .. Each member constituting the substrate 2 with a connector has been described above.

Next, the procedure for assembling the substrate 2 with the connector will be described. First, the connection terminal portions 21 of the plurality of L-shaped terminals 20 are penetrated through the press-fitting holes 13 of the housing 10 (terminal holding portion 11) from the rear side in the direction in which the mounting terminal portions 22 extend downward. Press in. As a result, the plurality of terminals 20 are held by the pair of terminal holding portions 11 (see FIG. 3). The tips of the plurality of connection terminal portions 21 are located inside the hood portion 12.

Next, the alignment plate 30 is predetermined by fitting the pair of corners 34 and the pair of corners 15 to each other while inserting the mounting terminal portions 22 of the plurality of terminals 20 into the plurality of positioning holes 31 from the lower side. It is fixed to the housing 10 by locking each other by the locking mechanism of (see FIG. 4). As a result, the alignment plate 30 is fixed to the housing 10 in a state where the mounting terminal portions 22 of the plurality of terminals 20 are positioned with respect to the plurality of through holes 41 of the substrate 40 by the positioning holes 31. As a result, the assembly of the connector 1 is completed, and the connector 1 shown in FIG. 4 is obtained.

Next, the circuit board 40 is brought closer to the assembled connector 1 from the lower side to the upper side, and the lower ends of the plurality of mounting terminal portions 22 are inserted into the plurality of through holes 41, respectively, while pairing the pair. The shaft portion of the bolt 50 is inserted into the pair of bolt insertion holes 42 of the circuit board 40 from below and screwed into the pair of bolt holes 33 of the alignment plate 30. As a result, the alignment plate 30 and the circuit board 40 are screwed together using a pair of bolts 50 and fixed to each other. As a result, the heads of the pair of bolts 50 are exposed on the lower surface (back surface) of the circuit board 40, and the lower ends of the mounting terminal portions 22 of the plurality of terminals 20 are slightly projected downward from the lower surface of the circuit board 40. Then, the housing 10 is fixed to the circuit board 40 via the alignment plate 30.

Next, the plurality of through holes 41 of the circuit board 40 and the plurality of terminals 20 are soldered. This soldering is performed by a so-called flow method using lead-free solder having a melting point higher than that of general solder. Specifically, by spraying the molten solder liquid on the back surface of the circuit board 40, the solder liquid penetrates into the through hole 41. At this time, the molten solder liquid is also sprayed on the head of the bolt 50 exposed on the back surface of the circuit board 40. Next, the solder liquid that has entered the through hole 41 is solidified. As a result, mounting of the housing 10 on the circuit board 40 via the alignment plate 30 is completed. That is, the assembly of the board 2 with a connector is completed, and the board 2 with a connector shown in FIGS. 1 and 2 is obtained.

The mating housing of the mating connector is fitted to the hood portion 12 of the housing 10 of the connector-equipped substrate 2 that has been assembled. As a result, the connection terminal portions 21 (male terminals) of the plurality of terminals 20 are connected to the plurality of mating terminals (female terminals), respectively, and the plurality of mating terminals and the conductor pattern (not shown) of the circuit board 40 are formed. Is electrically connected via the plurality of terminals 20.

Hereinafter, as in this example, the flow type soldering is performed in a state where the housing 10 fixed to the housing 10 and the alignment plate 30 which is separate from the housing 10 are fixed to the circuit board 40 by screwing with bolts 50. Describe the advantages of doing so.

If the flow type soldering is executed while the housing 10 is directly fixed to the circuit board 40 by screwing with bolts 50, the head of the bolts 50 exposed on the back surface of the circuit board 40. Also, the molten solder liquid is sprayed. As a result, the bolt 50 is heated to a high temperature comparable to that of the solder liquid. Therefore, the housing 10 may be softened or deformed at the contact point between the bolt 50 and the housing 10 (that is, the screwed portion). In particular, since lead-free solder having a melting point higher than that of general solder is used, the temperature of the bolt 50 becomes even higher, so that there is a high possibility that the above-mentioned housing 10 is thermally deformed.

In order to deal with this problem, a method of changing the resin material constituting the housing 10 from PBT resin to SPS resin (syndiotactic polystyrene resin) having high heat resistance can be considered. Alternatively, a method of narrowing the range in which the solder liquid is sprayed on the back surface of the circuit board 40 so that the solder liquid is not sprayed on the heads of the pair of bolts 50 (so-called local flow adoption) can be considered. However, both methods may significantly increase the manufacturing cost.

On the other hand, in the substrate 2 with a connector, the alignment plate 30 which is separate from the housing 10 fixed to the housing 10 is fixed to the circuit board 40 by screwing with bolts 50. In addition, in the alignment plate 30, the engagement portion where the housing 10 and the alignment plate 30 are engaged (that is, the groove 34a in the pair of corners 34) and the contact portion where the alignment plate 30 and the bolt 50 come into contact (that is, the contact portion). That is, the pair of bolt holes 33) are located at different positions separated from each other in the front-rear direction. Therefore, even if the molten solder liquid is sprayed and the temperature of the bolt 50 becomes high, it is difficult for the heat of the bolt 50 to be transferred to the housing 10. Therefore, the housing 10 is unlikely to be softened or deformed.

Further, the alignment plate 30 is made of a material (SPS resin) having higher heat resistance than the material (PBT resin) constituting the housing 10. Therefore, even if the molten solder liquid is sprayed and the bolt 50 becomes hot, the alignment plate 30 is provided at the contact point between the bolt 50 and the alignment plate 30 (specifically, a portion near the pair of bolt holes 33). Hard to soften and deform. From the above, the substrate 2 with a connector is excellent in assembly accuracy with the circuit board 40 even if flow-type soldering using lead-free solder having a melting point higher than that of general solder is performed.

<Action / effect>
As described above, according to the connector 1 and the board with a connector 2 according to the present embodiment, a separate alignment plate 30 that engages with the housing 10 is attached to the circuit board 40 using metal bolts 50. Further, the alignment plate 30 is made of a material having higher heat resistance than the material constituting the housing 10. Therefore, since the connector 1 and the substrate 2 with a connector can suppress thermal deformation of the housing 10 at the time of soldering as compared with the conventional connector, the assembly accuracy with the circuit board 40 is excellent.

Further, in the connector 1 and the substrate with a connector 2 according to the present embodiment, the alignment plate 30 has a positioning hole 31 having a function of positioning the terminal 20 with respect to the through hole 41 of the circuit board 40. Therefore, since the alignment plate 30 is directly fixed to the circuit board 40 by using the bolt 50, the terminal for the through hole 41 is compared with the general structure in which the alignment plate 30 and the housing 10 are separate bodies. The positioning accuracy of 20 is improved.

Further, in the connector 1 and the substrate with a connector 2 according to the present embodiment, the engagement portion between the housing 10 and the alignment plate 30 and the contact portion between the alignment plate 30 and the bolt 50 are at different positions. Therefore, the former engaging portion is less likely to be affected by the heat transferred to the latter contact portion via the bolt 50. Therefore, it is possible to suppress thermal deformation of the housing 10 at the engaging portion during soldering and maintain a state in which the housing 10 is properly engaged with the alignment plate 30.

Further, the alignment plate 30 separate from the housing 10 is provided with a bolt hole 33 into which the bolt 50 is screwed. Therefore, when changing the specifications of the bolt 50, it is only necessary to change the specifications of the bolt holes 33 of the alignment plate 30 without changing the housing 10. Therefore, the degree of freedom in design for changing the bolt 50 is improved as compared with the mode in which the bolt hole 33 into which the bolt 50 is screwed is provided in the housing 10. Further, the manufacturing cost of the connector 1 can be reduced.

<Other forms>
The present invention is not limited to each of the above embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, and the like. In addition, the material, shape, dimensions, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

In the above embodiment, an alignment plate 30 having a terminal positioning hole 31 is adopted as the "mounting portion" of the present invention. On the other hand, the "mounting portion" of the present invention is made of a resin material having higher heat resistance than the resin material constituting the housing 10, is engaged with the housing 10, and is mounted with a metal such as a bolt 50. Any resin component may be adopted as long as it is attached to the circuit board 40 using the component. Further, in addition to the bolt 50, other mounting parts may be used as long as they are metal mounting parts having high thermal conductivity.

Here, the features of the above-described embodiments of the connector 1 and the substrate with a connector 2 according to the present invention are briefly summarized and listed below in [1] to [4], respectively.
[1]
A terminal (20) to be soldered to a through hole (41) provided on the board (40), and a terminal (20).
A housing (10) holding the terminal (20) and
It is made of a material having higher heat resistance than the material constituting the housing (10), engages with the housing (10), and is attached to the substrate (40) using a metal mounting component (50). A mounting portion (30) to be provided.
Board-mounted connector (1).
[2]
In the connector (1) described in the above [1],
The mounting portion (30)
The housing (31) has a positioning hole (31) for positioning the terminal (20) with respect to the through hole (41), and the terminal (20) is inserted through the positioning hole (31). Engaged in 10),
Board-mounted connector (1).
[3]
In the connector (1) according to the above [1] or the above [2],
The contact between the engaging portion (15, 34) at which the housing (10) and the mounting portion (30) are engaged, and the contact between the mounting portion (30) and the mounting component (50). The location (33) is different from that of the location (33).
Board-mounted connector (1).
[4]
A board (2) with a connector including a connector (1) and a board (40) on which the connector (1) is mounted.
The connector (1)
A terminal (20) to be connected to the through hole (41) provided in the substrate (40) by using solder, and a terminal (20).
A housing (10) holding the terminal (20) and
A mounting portion (30) made of a material having higher heat resistance than the material constituting the housing (10), which engages with the housing (10) and uses a metal mounting component (50). A board with a connector (2) including a mounting portion (30) to be mounted on the board (40).

1 Connector 2 Board with connector 10 Housing 20 Terminal 30 Alignment plate 31 Positioning hole 40 Circuit board (board)
41 Through hole 50 bolts (mounting parts)

Claims (4)

The terminals that will be inserted into the through holes provided on the board and soldered,
A housing that holds the terminals and
It is composed of a material having higher heat resistance than the material constituting the housing, and includes a mounting portion that engages with the housing and is mounted on the substrate by using a metal mounting component.
Board-mounted connector. In the connector according to claim 1,
The mounting part is
It has a positioning hole for positioning the terminal with respect to the through hole, and is engaged with the housing with the terminal inserted through the positioning hole.
Board-mounted connector. In the connector according to claim 1 or 2.
The engaging portion where the housing and the mounting portion are engaged and the contact portion where the mounting portion and the mounting component come into contact with each other are at different positions.
Board-mounted connector. A board with a connector including a connector and a board on which the connector is mounted.
The connector is
Terminals that will be connected to the through holes provided in the board using solder,
A housing that holds the terminals and
A mounting portion made of a material having higher heat resistance than the material constituting the housing, which engages with the housing and is mounted on the substrate by using a metal mounting component. , With
Board with connector.

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